On Apr 27, 2010, at 16:08 , Simon Riggs wrote: > On Tue, 2010-04-27 at 08:59 -0500, Kevin Grittner wrote: >> Why? I must be missing something, because my feeling is that if you >> can't trust your OS to cover something like this, how can you trust >> any application *running* under that OS to do it? > > Good questions. I'm exploring a perceived need. > > I don't think people want this because they think the OS is flaky. It's > more about trusting all of the configurations of all of the filesystems > in use. An explicit mechanism would be more verifiably accurate. It > might just be about control and blame.
I believe a reason for people (including me) to not have 100% faith in file modification times are non-monotone system clocks. I've seen more than one system where a cron job running ntpdate every night was used as a poor man's replacement for ntpd... So the real advantage of rolling our own solution is the ability to use LSNs instead of timestamps I'd say. best regards, Florian Pflug -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
